From: Phil Hopkinson [mailto:phopkinson@hvolt.com]  

Sent: Wednesday, October 12, 2011 12:00 AM

To: Tendulkar, Vijay; Caskey, John; Brian Coffey; Alex Hofmann; Andrew Delaski; Aris Marantan; Art

Rosenfeld; Bob Saint; Bruce Smith; Caitlin Johnson; Carlos Gaytan; Charlie Drexler; Charlie Stevens; Chris

Bolduc; Silcox, Clark; Creevy, Jim; Dan Cohen; Daniel Young; Eric Peterson; Freeman, Jeremiah; Gary

Fernstrom; Greg Coulter; Greg Rosenquist; Hirsch, Bruce R; James Lass; Jennifer Tiedeman; Jerry

Corkran; Jerry Hodge; Jerry Schoen; Joanna Mauer; John Cymbalsky; John Rossetti; Katie Coughlin; Ken

Winder; Mahesh P. Sampat; Matt Miller; Matthew Nardotti; Meg Waltner; Meyers, Aaron; Michael

Hyland; Michael Rivest; Millure, Dave; Phil Harter; Polinski, Raymond; Puesh Kumar; Richard Parker; Rick

Anderson; Rob Greeson; Robert Berman; Robert van Buskirk; Robin Roy; Ryan, Paul; Scott Beck;

Simmons, Chuck; Steve Nadel; Steve Rosenstock; Tim Ballo; Tom Eckman; Wes Patterson; Zhimei Luo

Subject: RE: NEMA transformer section comments regarding DOE negotiated rulemaking process and

analysis for distribution transformers

Good comments VJ

Phil

Philip J Hopkinson, PE

President & CEO HVOLT Inc.

3704 High Ridge Rd.

Charlotte, NC 28270

phopkinson@hvolt.com

Ph     704‐846‐3290

Fx     704‐845‐2520

Cell   704‐236‐3320

www.hvolt.com

From: Tendulkar, Vijay [mailto:vijay.tendulkar@onyxpower.com]  

Sent: Tuesday, October 11, 2011 11:42 PM

To: Caskey, John; Brian Coffey; Alex Hofmann; Andrew Delaski; Aris Marantan; Art Rosenfeld; Bob Saint;

Bruce Smith; Caitlin Johnson; Carlos Gaytan; Charlie Drexler; Charlie Stevens; Chris Bolduc; Silcox, Clark;

Creevy, Jim; Dan Cohen; Daniel Young; Eric Peterson; Freeman, Jeremiah; Gary Fernstrom; Greg Coulter;

Greg Rosenquist; Hirsch, Bruce R; James Lass; Jennifer Tiedeman; Jerry Corkran; Jerry Hodge; Jerry

Schoen; Joanna Mauer; John Cymbalsky; John Rossetti; Katie Coughlin; Ken Winder; Mahesh P. Sampat;

Matt Miller; Matthew Nardotti; Meg Waltner; Meyers, Aaron; Michael Hyland; Michael Rivest; Millure,
Dave; Phil Harter; Phil Hopkinson; Polinski, Raymond; Puesh Kumar; Richard Parker; Rick Anderson; Rob

Greeson; Robert Berman; Robert van Buskirk; Robin Roy; Ryan, Paul; Scott Beck; Simmons, Chuck; Steve

Nadel; Steve Rosenstock; Tim Ballo; Tom Eckman; Wes Patterson; Zhimei Luo

Subject: NEMA transformer section comments regarding DOE negotiated rulemaking process and

analysis for distribution transformers

                TO:  Mr. Richard Parker,  members of LVDT Committee, NEMA Members, DOE

                The attached comments are offered to the DOE, Navigant, LBL and the Committee members

concerning the negotiated rulemaking process for distribution transformer energy efficiency standards.

                The basic points presented in the comments are:

1) Limitations of design software

2) Problems with core materials  

3) Difficulties with mixed low volume production of LVDT by small manufacturers

4) Exemptions for Data Center Transformers and Solar Power Transformers  

                                                                                                                                                                                            

                                                                                                    With Kind Regards,

                                                                                                                                                                                            

                                                                                                                    V. B. Tendulkar